074
FNCA52 TJSJ 110755
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
355 AM AST SAT JUL 11 2026
DISCUSSION
CONDITIONS ARE HIGHLY FAVORABLE FOR RAPID FIRE DISPERSION ACROSS
THE REGION TODAY. SURFACE OBSERVATIONS HAVE BEEN INDICATING
RELATIVE HUMIDITY VALUES DROPPING INTO THE LOWER 50S, GENERALLY
RANGING BETWEEN 50 AND 60 PERCENT, PARTICULARLY ACROSS THE
SOUTHERN COASTAL PLAINS OF PUERTO RICO. THIS SIGNIFICANTLY DRY AIR
MASS IS BEING ACCOMPANIED BY BREEZY CONDITIONS, WITH SUSTAINED
EASTERLY WINDS BETWEEN 15 AND 18 MPH AND FREQUENT WIND GUSTS
BETWEEN 25 AND 30 MPH. GIVEN THESE BREEZY AND DRY CONDITIONS,
COUPLED WITH PERSISTENT RAINFALL DEFICITS, CRITICALLY DRY FUELS
CONTINUE ACROSS MUCH OF PUERTO RICO, VIEQUES, CULEBRA, AND ST.
CROIX. THEREFORE, A FIRE DANGER STATEMENT REMAINS IN EFFECT TODAY.
PRZ014-112015-
SOUTHEAST COASTAL PLAINS-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER CLEAR CLEAR MCLEAR
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 10
TEMP (24H TREND) 94 (+3) 74 (-3) 93
RH % (24H TREND) 40 (-9) 81 (+1) 42
WIND 20FT/EARLY(MPH) E 16 G23 NE 14 E 18
WIND 20FT/LATE(MPH) E 19 G30 NE 12 E 19
MIXING HGT(FT-AGL/MSL)4960 5880
TRANSPORT WND (MPH) E 22 E 20
VENT RATE (KT-FT) 94240 99960
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-112015-
SOUTHERN HILLS-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 0 0 20
TEMP (24H TREND) 90 (+3) 70 (-3) 89
RH % (24H TREND) 51 (-8) 94 (+5) 56
WIND 20FT/EARLY(MPH) E 17 NE 14 E 14
WIND 20FT/LATE(MPH) E 19 NE 14 E 14
MIXING HGT(FT-AGL/MSL)5180 6090
TRANSPORT WND (MPH) E 21 E 17
VENT RATE (KT-FT) 93240 91350
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-112015-
NORTH COASTAL PLAINS-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 0 20
TEMP (24H TREND) 90 (-1) 74 (-3) 90
RH % (24H TREND) 58 (-3) 93 (+5) 60
WIND 20FT/EARLY(MPH) E 18 E 19 E 17
WIND 20FT/LATE(MPH) E 19 E 16 E 21
MIXING HGT(FT-AGL/MSL)4820 5500
TRANSPORT WND (MPH) E 23 E 21
VENT RATE (KT-FT) 96400 99000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-112015-
NORTHERN HILLS-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 40
TEMP (24H TREND) 89 (-1) 72 (-2) 89
RH % (24H TREND) 58 (0) 94 (+2) 62
WIND 20FT/EARLY(MPH) E 17 E 18 E 16
WIND 20FT/LATE(MPH) NE 19 E 13 NE 19
MIXING HGT(FT-AGL/MSL)5210 6000
TRANSPORT WND (MPH) E 18 E 16
VENT RATE (KT-FT) 83360 84000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-112015-
WEST COAST-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 0 60
TEMP (24H TREND) 94 (+1) 72 (-2) 93
RH % (24H TREND) 54 (-6) 92 (+2) 56
WIND 20FT/EARLY(MPH) E 14 E 19 E 13
WIND 20FT/LATE(MPH) E 19 E 18 E 14
MIXING HGT(FT-AGL/MSL)4430 5550
TRANSPORT WND (MPH) E 10 E 12
VENT RATE (KT-FT) 39870 55500
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-112015-
EASTERN INTERIOR-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 89 (+1) 72 (-3) 89
RH % (24H TREND) 57 (-5) 94 (+5) 60
WIND 20FT/EARLY(MPH) E 16 E 16 E 14
WIND 20FT/LATE(MPH) E 18 E 16 E 14
MIXING HGT(FT-AGL/MSL)5230 6440
TRANSPORT WND (MPH) E 21 E 17
VENT RATE (KT-FT) 94140 96600
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-112015-
LUQUILLO MOUNTAIN RANGE-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 30
TEMP (24H TREND) 85 (+4) 70 (-3) 84
RH % (24H TREND) 65 (-8) 98 (+5) 67
WIND 20FT/EARLY(MPH) E 13 E 13 E 13
WIND 20FT/LATE(MPH) E 13 E 13 E 13
MIXING HGT(FT-AGL/MSL)4730 5330
TRANSPORT WND (MPH) E 22 E 18
VENT RATE (KT-FT) 89870 85280
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-112015-
CENTRAL MOUNTAIN RANGE-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 60
TEMP (24H TREND) 89 (+3) 68 (-3) 88
RH % (24H TREND) 57 (-3) 97 (+4) 62
WIND 20FT/EARLY(MPH) E 12 NE 14 E 10
WIND 20FT/LATE(MPH) E 18 E 13 E 12
MIXING HGT(FT-AGL/MSL)6470 7290
TRANSPORT WND (MPH) E 16 E 13
VENT RATE (KT-FT) 90580 80190
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-112015-
CAYEY MOUNTAIN RANGE-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 0 20
TEMP (24H TREND) 85 (+2) 69 (-4) 85
RH % (24H TREND) 62 (-6) 99 (+5) 66
WIND 20FT/EARLY(MPH) E 16 NE 13 E 13
WIND 20FT/LATE(MPH) E 19 E 12 E 13
MIXING HGT(FT-AGL/MSL)4880 5800
TRANSPORT WND (MPH) E 23 E 20
VENT RATE (KT-FT) 97600 98600
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-112015-
VIEQUES-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 89 (0) 77 (-2) 89
RH % (24H TREND) 58 (-3) 86 (+4) 58
WIND 20FT/EARLY(MPH) E 17 E 19 E 17
WIND 20FT/LATE(MPH) E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL)4070 3970
TRANSPORT WND (MPH) E 23 E 22
VENT RATE (KT-FT) 81400 75430
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-112015-
CULEBRA-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 90 (+2) 78 (-2) 90
RH % (24H TREND) 57 (-8) 88 (+5) 59
WIND 20FT/EARLY(MPH) E 17 E 19 E 17
WIND 20FT/LATE(MPH) E 17 E 19 E 17
MIXING HGT(FT-AGL/MSL)3910 4220
TRANSPORT WND (MPH) E 23 E 23
VENT RATE (KT-FT) 78200 84400
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-112015-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 0 0 10
TEMP (24H TREND) 94 (+2) 74 (-2) 94
RH % (24H TREND) 42 (-8) 82 (+2) 43
WIND 20FT/EARLY(MPH) E 18 G27 E 18 E 19
WIND 20FT/LATE(MPH) E 19 G30 E 14 E 19
MIXING HGT(FT-AGL/MSL)4700 5540
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 70500 88640
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-112015-
SAINT THOMAS AND SAINT JOHN-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 10
TEMP (24H TREND) 88 (+2) 77 (-2) 88
RH % (24H TREND) 61 (-7) 89 (+5) 62
WIND 20FT/EARLY(MPH) E 18 E 19 E 18
WIND 20FT/LATE(MPH) E 18 E 19 E 17
MIXING HGT(FT-AGL/MSL)3670 4090
TRANSPORT WND (MPH) E 24 E 24
VENT RATE (KT-FT) 77070 85890
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-112015-
ST CROIX-
355 AM AST SAT JUL 11 2026
TODAY TONIGHT SUN
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 20
TEMP (24H TREND) 89 (+2) 77 (-2) 89
RH % (24H TREND) 61 (-5) 88 (+4) 63
WIND 20FT/EARLY(MPH) E 18 E 19 E 19
WIND 20FT/LATE(MPH) E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL)5430 5140
TRANSPORT WND (MPH) E 25 E 22
VENT RATE (KT-FT) 119460 97660
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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